添加文档注释，方便生成技术文档

src/hooks/useIndex.ts

@@ -1,8 +1,15 @@
 import { useRoute } from 'vue-router';
 
+/**
+ * 首页导航相关钩子函数
+ * @returns 顶部导航映射和激活状态判断函数
+ */
 export const useIndex = () => {
   const route = useRoute();
 
+  /**
+   * 顶部导航映射配置
+   */
   const topNavMap = [
     { title: '暴雨灾害链', name: 'rainstorm', query: { identification: 1 } },
     { title: '地震灾害链', name: 'earthquake', query: { identification: 2 } },
@@ -12,7 +19,11 @@ export const useIndex = () => {
     { title: '文件管理', name: 'index', query: { identification: 6 } },
   ];
 
-  // 判断当前导航项是否激活
+  /**
+   * 判断当前导航项是否激活
+   * @param identification - 导航项标识
+   * @returns 是否为激活状态
+   */
   const isActive = (identification: number) => {
     const targetId = identification.toString();
     let currentId = route.query.identification;